μMongo is a Python MongoDB ODM. It inception comes from two needs: the lack of async ODM and the difficulty to do document (un)serialization with existing ODMs.
From this point, μMongo made a few design choices:
- Stay close to the standards MongoDB driver to keep the same API when possible:
use
find({"field": "value"})like usual but retrieve your data nicely OO wrapped ! - Work with multiple drivers (PyMongo, TxMongo, motor_asyncio and mongomock for the moment)
- Tight integration with Marshmallow serialization library to easily dump and load your data with the outside world
- i18n integration to localize validation error messages
- Free software: MIT license
- Test with 90%+ coverage ;-)
µMongo requires MongoDB 4.2+ and Python 3.7+.
Quick example
import datetime as dt
from pymongo import MongoClient
from umongo import Document, fields, validate
from umongo.frameworks import PyMongoInstance
db = MongoClient().test
instance = PyMongoInstance(db)
@instance.register
class User(Document):
email = fields.EmailField(required=True, unique=True)
birthday = fields.DateTimeField(validate=validate.Range(min=dt.datetime(1900, 1, 1)))
friends = fields.ListField(fields.ReferenceField("User"))
class Meta:
collection_name = "user"
# Make sure that unique indexes are created
User.ensure_indexes()
goku = User(email='goku@sayen.com', birthday=dt.datetime(1984, 11, 20))
goku.commit()
vegeta = User(email='vegeta@over9000.com', friends=[goku])
vegeta.commit()
vegeta.friends
# <object umongo.data_objects.List([<object umongo.dal.pymongo.PyMongoReference(document=User, pk=ObjectId('5717568613adf27be6363f78'))>])>
vegeta.dump()
# {id': '570ddb311d41c89cabceeddc', 'email': 'vegeta@over9000.com', friends': ['570ddb2a1d41c89cabceeddb']}
User.find_one({"email": 'goku@sayen.com'})
# <object Document __main__.User({'id': ObjectId('570ddb2a1d41c89cabceeddb'), 'friends': <object umongo.data_objects.List([])>,
# 'email': 'goku@sayen.com', 'birthday': datetime.datetime(1984, 11, 20, 0, 0)})>Get it now:
$ pip install umongo # This installs umongo with pymongo $ pip install my-mongo-driver # Other MongoDB drivers must be installed manually
Or to get it along with the MongoDB driver you're planing to use:
$ pip install umongo[motor] $ pip install umongo[txmongo] $ pip install umongo[mongomock]